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My Anchor program is giving me a Transaction simulation failed: Error processing Instruction 1: custom program error: 0xa7 with nothing useful in the logs.

How do I even begin to debug this?

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Custom Program Error 0xa7 is Error: 167: The given account is not owned by the executing program.

This might happen if you pass in an account that's expected to be owned by a program, but isn't.

This can happen accidentally if you forget to set declare_id!(/* ... */) to the program id you're trying to hit.

Consider logging the program id that you're using in your javascript client:

console.log(program.programId)

And then seeing if that matches the public key that's in your target/idl/yourprogram.json file.

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3 Comments

here's some query on this, see issues and code github.com/…
where did you lookup the error codes?
@BennoDev The 'custom program error' comes from the file error.rs in whatever the program is.

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